2) What is NOT a physical security measure for your home? (Antiterrorism Scenario Training, Page 2)

a. Hiding a key outside to ensure family members can get in if they lose their keys.

b. Monitoring Internet acquaintances of all family members.

c. Confirming that a cleaning company is reliable and licensed.

d. Changing locks to ensure key control.

e. Having good relations with neighbors and looking out for each other.

a. Hiding a key outside to ensure family members can get in if they lose their keys.

Explanation:

According to the Antiterrorism Scenario Training

Hiding a key outside to ensure family members can get in if they lose their keys is not a physical security measure for the home because of the reason that this risks and increases the chances of getting an intruder to get access in the building.

The intruder may find these keys and can get an easy and safe access in the home.